Datapoint Welsh English/Was/were generalization
B - feature is neither pervasive nor extremely rare
I were / she were / we was / you was (PL) / they was
Parry, David 1999
And these girls sitting behind me was using the f-word all the way home.
British Broadcasting Corporation 2005
If you was to say like, "oh" every word that you used was…
They was travelling in London.
I weren't very pleased shall we say.
And and we was in a pleasant hotel etcetera
They was out there.